Method for producing a modified propylene polymer

Abstract

Disclosed is a method for producing a modified propylene polymer, the method comprising heating a mixture of 100 parts by weight of a propylene polymer (A) defined below and from 0.1 to 50 parts by weight of an ethylenically unsaturated bond-containing monomer (B) in the presence of from 0.01 to 20 parts by weight of an organic peroxide (C); propylene polymer (A) being a propylene polymer composed of from 0.5 to 90% by weight of a propylene polymer component (A1) having an intrinsic viscosity [η], as measured in tetralin at 135° C., of from 5 dl/g to 15 dl/g and from 10 to 99.5% by weight of a propylene polymer component (A2) having an intrinsic viscosity [η], as measured in tetralin at 135° C., of not less than 0.1 dl/g but less than 5 dl/g.

1. A method for producing a modified propylene polymer, the method comprising heating a mixture of 100 parts by weight of a propylene polymer (A) defined below and from 0.1 to 50 parts by weight of an ethylenically unsaturated bond-containing monomer (B) in the presence of from 0.01 to 20 parts by weight of an organic peroxide (C); 
       propylene polymer (A):
 a propylene polymer composed of from 0.5 to 90% by weight of a propylene polymer component (A1) having an intrinsic viscosity [η], as measured in tetralin at 135° C., of from 5 dl/g to 15 dl/g and from 10 to 99.5% by weight of a propylene polymer component (A2) having an intrinsic viscosity [η], as measured in tetralin at 135° C., of from 0.3 dl/g to 3 dl/g, provided that the overall weight of the propylene polymer (A) composed of the component (A1) and the component (A2) is 100% by weight, 
 wherein the modified propylene polymer has a molecular weight distribution (Mw/Mn) of 3 to 6 measured by gel permeation chromatography (GPC). 
 
     
     
       2. The method according to  claim 1 , wherein the ethylenically unsaturated bond-containing monomer (B) is an ethylenically unsaturated bond-containing monomer having at least one functional group selected from the group consisting of a hydroxyl group, a carboxyl group, an epoxy group, an amino group, an amide group, an imidazole group, a pyridine group, a piperidine group, a silyl group, a cyano group, an isocyanate group and an oxazoline group.